You will need to put your SIM into the SIMtrace hardware, connect one of the four flex cables to the SIMtrace hardware, put the other side into the SIM socket of your phone. Use USB to connect the SIMtrace hardware to the PC. On your PC you should be able to see the USB device now.

SIMtrace being connected

$ ./simtrace simtrace - GSM SIM and smartcard tracing (C) 2010 by Harald Welte <laforge@gnumonks.org> Launching the simtrace will try to find the SIMtrace hardware and then try to claim the USB device. The application will send the received data encapsulated in the GSMTAP format on localhost and the IANA assigned GSMTAP port.

The wireshark application will start a GUI and given the right permissions you should be able listen to the localhost interface and filter for the GSMTAP port on 4729. You should be able to see the decoded messages like in the figure below.

SIMtrace sending data

The current firmware has two known bugs that limit the usage of the device. There is a problem with the enumeration on USB 3.0 controllers and the second is related to enumeration on OS X (Lion). The firmware does not properly enumerate on systems with USB 3.0 controllers. The issue has not been analyzed and the workaround is to use a USB < 3.0 port or put a USB < 3.0 hub between. The firmware sends a wrong Zero Length Packet as a response to a GET_DESCRIPTION request. OSX handles this by resetting the device.

The hardware is capable to be used as an ordinary card reader, provide Man-In-The-Middle (MITM) attacks, or operate as a SIM. The firmware currently does not have support for these modes.